Used, very good condition, Rock River Arms 6-position stock, buffer tube/receiver extension (commercial), and carbine spring. All came off of a factory-built RRA lower assembly. Used but not abused. Black.
Also, set of double heat shield carbine handguards, excellent condition. Modern M4 profile. I don't know the make, got them from BCM about 5 years ago, IIRC.
Asking $45 $40 shipped Priority Mail
for the lot. PayPal preferred. US (free states) only.